Collapsible core



y 6, 1950 E. w. MORSE 2,507,924

COLLAPSIBLE CORE Filed June 17, 1947 2 Sheets-Sheet 1 IN VEN TOR.

EMERY W. MORSE 64 l u 54: ATTORNEYS y 6, 1950 E. w. MORSE 2,507,924

COLLAPSIBLE CORE EMERY \N. MORSE BY WWW Wi wa AT ORNEYS Patented May 16, 1950 BATE or m ce.

SIBIJE". (JOEE:

Emery W Mor n rvale, Calif;

Application June 17, 1947, SeriakN'ol 755,074:

-.Claims. 1::

presentsinvention relatestov improvem nts in a-coll'apsible core, and hasparticlilarrefieWhG to. a. core adapted to; be employediinscp structing hollow concrete walls. It; consists: of; oombir nations, constructions and arrangement of parts hereinafter described and claimed.

An object of my invention isgto: provide proved: collapsible core; to be used; in form 1 g: air columns: in concrete walls during: pourin of the concrete. It is. well known: that; suohaircolumns prevent the walls frombec'ommg amn. nd furthenprovide good insulatiom.

The. core isins the natureor an. expansible and contractible form. In constructing ahollow concrete wall, the core isv expanded; and supported between the usual form.- boards; providedfor the wall- After a course of;- conciete. has been poured and allowed-to set, thecore is contracted so that it. may be raised to a higher level betweenthe form: boards for pouring another course oi con-- crete. Then the core; is expandedagain with, its lowerendanchored inthe air column. provided bythe previous pouring. These steps are repeated; until the wallhasreached the; desired height.

More speeificatlydescribed, Iprovide. opposing core plates that are arranged todefine-aconduitlikerform. A central post is disp ed. lengthwise of the form along the longitudinal axis-thereof. This; post is; operable from a position above: the ilorm, When the central post is. movedg'end-wise in ne d rection, the core-like form. xpanded outwardly while maintaining. the plates. in con.- tact with one another. moving the'central post in the opposite direction, the form contracted, thus freeing the plates from the concrete walls: of the, air column...

Anotherobject of myinvention: is toproviple a collapsiblecore ofsturdy con truct on. ha is durable and efficient for the purpose." intended, and-which is. easy'to operate.

Other objects and advanta estwill appear as the specification continues. The novel-i features will be set forth in the claims;hereunto)v append For a better understanding ofmyinvention, reference should be had to the.- accomp nyin drawings; forming :part or this application, in which:

Figure 1 is. a plan View" of a concrctewalllconstructed with my collapsiblev core. whenused to provide air columns in the wallduringpouring thereof; I

Figure 2 is an: isometric view of the oollopfi bl core. inexpancledposition;

Eigure 3. is. an isometric;v illustration of. th

1 collapsible core-withthecorenlateszanctitopcov r relationw tho e anotherremovect soasuto. disclose. the. interior ment, theupner na tof the. cent a n st b in cut away;

Figures 4:.- and 5; are sometrio ews.- of; a angle bracket: and. a-cam track; resne t re yr. tha Lem.- pl y:

Figure (iris. aplan view tmroll n i le ore;

Figures 7 and; a ve ti al; ect nal taken along he lin s. VII- H and: H r VIIl. nesnectitzelya oftfi'igure Figure: 9 s: a: horiz n al. ransv rse ec ona view taken along the=lineIXr=1X i Figure 8, the form. bein expanded; and

Figur 10 is: a V ew s milar-to iguret tlustratingthe f rm con as d-f.

While Ihave shown. n y th 'pr ferred fo mof my invent on. i-shou be erstooci that-var ou Qhan eso mod ficat onsmaye m e h h scope or the anne d l ims. w thou epartin fr m. h spirit; thereof.

Referrin to the dr w nes adetait p o ide a collapsible or n icated enerally atA- n. constructina a concretewall. B (see Figure. 1),. th us al f rm o d re rrang d insp c d-apa-r heseboardsareslmported-by retainer posts. 2.; disposed at nt rva onthe-outeriaces oi the. form-boards. Spreaders 3. areusedte hold theform boards from. moving inwardly; Verticalai columns e areprovided in the concrete well during. r ut ne. h reof. by. employ-ins my'collapsible core, Thesequencaoi the st ps.- w ll be described m re. f lly af r th detailsof the core areset orth- The collapsiblecore-A includes. a pair of, 0,1;- posing core plates 5 and. a second pair oropposing core plate 6. These two pairs are arranged at ri ht angl s to. ne ano h r nd pr vide. a. form substantially rectangular in cross section (see Fi ures 9. and. 0 h pla es 5- and. 6; re. fashone i with mar ina fla ges 5a. nd. Wirespecti-Vely, which extend; lengthwise along opposin side edges-thereof. The flangesi aand 6a are arranged in overlappin and sliding, relation witheach. othertodefine a conduit-like form. As the-core, is expanded or contraetedin the-manner h reinafter, described. he flan es. 5a. and a, maint i ontacth s e eventm resh y poure concrete from entering the hollow interior I of thecore- Referringnow to Figures 3 and Halo, inclusive. I have show a pai of; side po ts. 8- havin the core. plates 5, secured thereto. by screws to. Lik wis the completes 6. areseoured. to a hai of si eposts 9 hysoltew ta. he. side posts. 8am ..reinforce the plat s 5. ends. tespec ive1 ...an

3 extend substantially throughout the entire lengths thereof (see Figures 7 and 8). A central post I is interposed between the side posts 8 and 9, and is moveable endwise in either direction along the longitudinal axis of the rectangle defined by the plates 5 and 6. All of these posts are arranged parallel with one another.

A top cover I l is mounted over the upper ends of the plates 5 and 6, and is spaced slightly therefrom. This cover has a depending flange Ila to limit outward movement of these plates. Four angle-shaped brackets 12 (see Figure 4) are attached to the underneath surface of the top cover by bolts l2a. Links H are swingably attached to these angle brackets by bolts 15. The lower ends of these links are accommodated in slots 8b and 9b fashioned in the side posts 8 and 9, respectively. Bolts [6 are used for swingably connecting the links M to upper portions of the side posts (see Figures 7 and 8). These links are arranged to allow the side posts to move outwardly and inwardly relative to the central post.

It will be noted from Figures 7 and 8 that two pairs of guides I! are fastened to the central part ID by screws l8. These guides are in the nature of flat strips, which straddle the side posts 8 and guide the latter toward and away from the central post It). In a like manner, two pairs of guides l9 made from flat strips are anchored to the central post by screws 29. The latter guides straddle the side posts 9 and guide them toward and away from the central post.

Each side post 8 has a pair of cam tracks 2| (see Figure 5) fastened thereto by screws Ma,

as clearly disclosed in Figure 7. Pins 22 are anchored to each pair of guides I1 and straddle the cam tracks 2|. Accordingly, when the central post I0 is pulled upwardly in Figure '7, the guides ll, cam tracks 2| and pins 22 will move the side posts 8 and core plates 5 inwardly. When the central post It! is pushed downwardly again, the core plates 5 will be moved outwardly. The fully expanded positions of the plates 5 are shown in Figure 9, while Figure discloses the contracted positions of these same core plates.

Also, each side post 9 has a pair of cam tracks 23 anchored thereto by screws 23a (see Figure 8) Each pair of guides I9 is provided with pins 24 that straddle the cam tracks 23. Upward movement of the central post In in Figure 8 will cause the guides l9, cam tracks 23 and pins 24 to move the side posts 9 and core plates 6 inwardly. As the central post is moved downwardly again, the core plates will move outwardly into expanded positions.

The central post l0 extends through a non-circular opening 25 provided in the top cover II and projects above the latter. The upper portion of the central post has a transverse bar 26 anchored therein to facilitate moving the central post It] upwardly and downwardly. The top cover H has a handle 21 secured thereto by screws 21a. This handle may be grasped by the finger tips 28 of the operator, while the latters palm 29 extends over the top of the central post, as suggested in Figure '7. In this manner, the central post may be pushed down to expand the form.

Returning now to the construction of the hollow concrete wall B, as illustrated in Figure l, the use of my collapsible core A during the pouring of the wall is briefly summarized as follows:

Assuming that the foundation (not shown) for the wall has been poured and the form boards I are supported by the retainer posts 2 and spreaders 3, a series of my collapsible cores are greased on their outer surfaces and then are supported between the form boards at the locations where the vertical air columns 4 are to be provided. The core plates 5 and 6 are moved outwardly by pushing down on the top of the central post I9. A course of concrete is poured between the form boards and around the collapsible cores.

This freshly poured concrete is allowed to set, which will take about four hours for an average mix. Next, the collapsible cores A are contracted by pulling the central post l0 upwardly. This will free the core plates 5 and 6 from the walls of the vertical air columns 4. The cores are drawn upwardly, leaving approximately six inches of the lower end of each core in the air columns provided by the first course of concrete. The cores are expanded again, additional form boards are added to those already in place, and the spreaders 3 are moved upwardly. .Now a second course of concrete is poured and permitted to set. These steps are repeated until the wall has reached the desired height.

I claim:

1. In a collapsible core to be employed in constructing hollow concrete walls; two pairs of opposing core plates arranged to provide a form substantially rectangular in transverse cross section; each plate having bevelled marginal flanges extending lengthwise along opposing side edges thereof; the flanges on each plate overlapping and sliding on the adjacent flanges of the two adjacent plates; a side post secured to the inner surface of each plate to reinforce the latter and extending substantially throughout the length of the plate; a central post moveable endwise in either direction along the longitudinal axis of the rectangle defined by the plates; all of the posts being arranged parallel with one another; and means interconnecting the central posts with all of the side posts for expanding the form outwardly while maintaining the flanges in contact when the central post is moved endwise in one direction, and. for contracting the form inwardly while maintaining the flanges in contact when the central post is moved endwise in the opposite direction.

2. In a collapsible core to be employed in constructing hollow concrete walls; two pairs of opposing core plates arranged to provide a form substantially rectangular in transverse cross section; each plate having bevelled marginal flanges extending lengthwise along opposing side edges thereof; the flanges on each plate overlapping and sliding on the adjacent flanges of the two adjacent plates; a side post secured to the inner surface of each plate to reinforce the latter and extending substantially throughout the length of the plate; a central post moveable endwise in either direction along the longitudinal axis of the rectangle defined by the plates; all of the posts being arranged parallel with one another; means interconnecting the central posts with all of the side posts for expanding the form outwardly while maintaining the flanges in contact when the central post is moved endwise in one direction, and for contracting the form inwardly while maintaining the flanges in contact when the central post is moved endwise in the opposite direction; the plates having upper ends; a top cover mounted over-the upper ends of the plates; and links swingably attached to the cover and to upper portions of the side posts; the links constituting supports from the cover for the side posts and their attached plates; the links being arranged to allow the side posts to move outwardly and inwardly relative to the central post.

3. In a collapsible core to be employed in constructing hollow concrete walls; a plurality of core plates arranged to provide a conduit-like form; the plates having upper ends; a top cover mounted over the upper ends of the plates; a central post moveable endwise in either direction along the longitudinal axis of the conduit-like form; the central post extending through the cover and projecting thereabove so that the palm of a persons hand may be pressed against the top of the central post; a handle secured to the cover and positioned to have the finger tips of the persons same hand engaged thereunder whereby downward pressure of the palm will push the central post downwardly relative to the cover; and means for expanding the conduit-like form outwardly while maintaining the plates in contact when the central post is moved endwise in one direction, and for contracting the form inwardly while maintaining the plates in contact when the central post is moved endwise in the opposite direction.

4. In a collapsible core to be employed in constructing hollow concrete walls; two pairs of thin opposing core plates having flat sections arranged to provide a form substantially rectangular in transverse cross section; each plate having bevelled flanges extending the entire length thereof along opposing sides; the flanges on each plate overlapping and sliding on the adjacent flanges of the two adjacent plates; side posts removably secured to the inner surfaces of the plates to reinforce the latter and extending substantially throughout the lengths of the plates; a central post moveable endwise in either direction along the longitudinal axis of the rectangle defined by the plate; all of the posts being arranged parallel with one another; pairs of flat plate-like guides removably fixed to the central post and straddling the side posts for guiding the latter toward and away from the central post; strip-like cam tracks removably secured to the side posts; means coacting with the cam tracks for expanding the form outwardly when the cen tral post is moved endwise in one direction, and for contracting the plates inwardly when the central post is moved endwise in the opposite direction; the plates having upper ends; a top cover mounted over the upper ends of the plates and having a depending marginal flange to limit outward expansion of the plates; and links swingably attached to the cover and to upper portions of the side posts; the links constituting supports from the cover for the side posts and their attached plates; the links being arranged to allow the side posts to move outwardly and inwardly relative to the central post; the central post extending through the cover and projecting thereabove.

EMERY W. MORSE.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 104,397 Enright June 14, 1870 668,474 Adam Feb. 19, 1901 1,242,092 Wazbinski Oct. 2, 1917 1,379,490 Thompson May 24, 1921 FOREIGN PATENTS Number Country Date 82,004 Switzerland Aug. 16, 1919 

